Telegraphy.



P. B. DELANY. TEiEGHAPHY.

K i APPLICATION- FILEDk lAN.9. 191|- RENEWED JUNE 2.1915. 1,149,428.

Patented Aug. 10, 1915.

2 SHEETSSHEET l.

P. B. DELANY.

TELEGRAPHY.

APPLICATION H1150 1AN.9.1911. RENEwED JUNE z. 1915.

2 SHEETS-SHEET Z.

Patented Aug. 10, 1915.

narran sTaTas TTTTNT oTTTcE.

PATRICK B. DELANY, OF SOUTH ORANGE, NEW JERSEY, ASSIGNOR TO DELANY TELE- GRAPHIC TRANSMITTER COMPANY,v OF NEW YORK,A N. Y., A CORPORATION OF MAINE.

TELEGRAPHY.

Specification of Letters Patent.

Patented Aug. 10, 1915.

Application filed January 9, 1911, Serial No. 601,571. Renewed June 2, 1915. Serial No. 31,791.

To all whom it may concern.

Be it known that 1, PATRICK B. DELANY, a citizen of the United States of America, residing in South Orange, county of Essex, State of New Jersey, have invented a certain new and useful Improvements in Telegraphy, of which the following is a specification.

This invention relates to a system of telegraphy in which dots and dashes, constituting component parts of signals, as in the Morse and Continental codes, are transmitted from a sending station to a distant station over a circuit composed in whole or in part of two conductors that may be indefinitely separated except at terminals. The

ydots and dashes are distributed between these two conductors so that the signal impulses on either one of them will be unintelligible. Such a system, broadly, is disclosed in United States Letters Patent granted to me January 17, 1911l No. 981,845. The present invention comprises the use of an ordinary Morse key with which all operators are familiar and the transfer of the circuit from the transmitting battery to the two conductors forming the main line is effected by local devices controlled by the Morse key.

In the drawing: Figure 1 is a diagrammatic illustration showing the main line composed of 'two conductors brought together at the translnitting and receiving stations. Fig. 2 is a diagrammatic view showing a somewhat similar arrangement except that the main line circuit is composed of sections one of which is a single conductor and the others have double conductors.

Referring to Fig. 1, terminal stations are marked respectively 1 and 4, and are connected by main line conductors 5, 6. At each station there is a circular toothed contact plate 7 with which the line conductor 5 is connected. Between Vthe teeth of this contact plate are placed insulated segments 8 with which the main line conductor 6 is connected.l Movable over the double series of contacts thus formed is a contact trailer carried by an insulated arm 9 driven step by step by a ratchet wheel 10 applied to its axis. This ratchet wheel is actuated by a pivoted spring pressed driving awl 11 in the end of a pivoted armature ever 12 of which 13 is the actuating magnet. The local circuit of this magnet including a local battery 14 is completed through a Morse key 15 and its back stop 16. The front stop of the Morse key is connected to a grounded transmitting battery 17 and the key is connected by conductor 18 with the insulated arm 9. 19 is a neutral relay. The two conductors or sides 5, (i of the main line are connected by a switch 20. The apparatus described is the same at both the sending and receiving stations. At one or both stations, however. the main line conductors include adjustable balancing resistances 21. The magnet 13 is shown as normally on closed circuit. The arrangement might be such that it would be normally on open' circuit. At the station that is to transmit, switch 20 is opened and at the receiving station it is closed.

The operation is as follows: When the `Morse key is depressed at station 1, the local y circuit of magnet 13 is open and its armature lever 12 under the stress of its spring rises, causing the pawl mounted in its end beyond its pivot to slip down over one or more ratchet teeth as may be required. lVhen the Morse key reaches its front stop, a signal impulse is sent from battery 17 through the key, wire 18, arm 9 and that one of the insulated contacts'8 upon which hears the trailer of the arm into main line conductor (j. lVhen the Morse key is lifted, magnet 13is energized and attracts its armature causing pawl 11 to operate the ratchet wheel and carry the contact traileronto an adjoining tooth of the toothed contact plate 7. ()n the `next depression of the Morse key, the operation is the same except that the signal impulse is now sent into con-v ductor 5 of the main line. The signal impulses pass from conductor 5 to the Contact plate 7 at the receiving station, thence through the closed switch 20 to the insulated contacts 8, and by trailer arm 9, wire 18 and VMorse key 15 to earth through the coils of neutral relay 19. Signal impulses passing over main line conductor 6 pass to the insulated contacts 8 at the receiving station and by trailer arm 9 to ground as before through the winding of neutral relay 19. It is irnmaterial whether normally the trailers rest upon corresponding contacts of the tables of contacts. Since, however, the trailers move after each impulse, the impulses constituting component parts, either dots or dashes, of signals will pass alternately over the two conductors of the main line. The conductors 5, 6, between stations may be very widely separated and be brought into the sending and receiving stations-in such way that it would be impossible for a wire `tappe'r to have access to both of them at the the main line conductors 5, 6, extend to an' intermediate station 2, from whence a single main line conductor 22 extends to an intermediate station 3, from whence the main line double conductors 5', 6 extend to terminal station 4. At intermediate station 2, the main line conductors 5, 6 are connected to insulated contact plates 82 and to the toothed contact wheel 72, as already described. The trailer arm 92, however, is connected through the winding `of a polarized relay 232 and thence through the winding of neutral relay 24 to the'single main line conductor 22 extending to station 3. The ina-in line conductors 6, 5, entering station 2 are respectively connected with the armature lever of polarized relay 23 and its left hand stop.

The local circuit of the motormagnet 112 may be traced as follows: from the right hand contact of polarized relay 232 throughl the coil of the magnet, thence through lthe local battery 142 and armature lever of neutral relay 24C and through the back stop thereof tol the armature lever of polarized relay 232. Assuming that station 1 is transmitting to station 4, switch 20 is open at station 1, and at station 4 switch 20t is closed. The first signal impulse sent-on depolarized relay 232 andneutral relay 24 to. the single main line conductor 22. The

effect of this signal impulse is to place the armature lever of the polarized relay 232 against its left hand stop and to open at its right hand stop the'motor magnet local circuit. The next signal impulse `from station 1 over the main line conductor 5 passes b v the bridge connection between the condhctors 5, 6, formed by the left hand stop and armature lever ci' polarized relay 232 to the insulated contacts 82 'and thence by trailer arm as before through the polarized relay 232 and neutral relay 24 to the single main line conductor 22 over which, ot course,

the dots and dashes pass in regular sequence to the neutral relay 24 at intermediate station 3. Thence the line circuit extends through the winding o polarized .re-lay 238 to trailer 'arm 93 at that station. The first of such signal impulsesarriving at station 3, sets the armature lever of polarized relay 233'against its right hand stop and the contact' trailer, being upon an insulated segment 83, said signal impulse passes now by conductor 6 to the insulated segment 34 at terminal station 4. AAt station 3, however, the motor magnet 113 is under control of the neutral relay 243, the local circuit of the motor magnet being as follows: from the back stop of the neutral relay 242 through the motor magnet winding to the right hand stop of polarized relay 233 thence by its armature lever through the local battery to the armature lever of said neutral relay. The two main line conductors 5', 6 vat station 3 are connected respectively with the left hand contact of the polarized relay and with the armature lever thereof, this being thefequivalent of, and in effect the same as, the open switch, such'as 20y at station 1.

y`When said first signal impulse passing this station is the same, of course, as that already described in connection ywith Fig. 1. When terminal station 4 is to transmit to station 1, switch 20-4 at station 4 is opened and the corresponding switch 20 at stationfl is closed. The first impulse from transmit- .ting battery 174 :1t-station 4 places the lever of polarized armature relay 233 at station 3l against its left hand contact, thusvopening the local circuit of the motor magnet 113 and the main line conductors 5', 6 at the polarized relay armature lever and its left hand stop. At the same time, the armaturelever of the polarized relay 232 at station 2 is moved to its right hand contact closing the circuit of motor magnet 112 and disconnecting the main line conductorsg, f3, at the armature lever of the polarized relay 232 its left hand stop. rlhe circuit of motor magnet 112 is now under control of the neutral relay 24: and, as it is successivelyenergized by successive impulses whether dots or dashes, the motor magnet 112 1s energized and the circuit of main line conductor 22 is successively transferred trom the insulated contacts 82 to the contact teeth of the toothed plate 72.

@n veryv long circuits, repeaters could be use'd in this system. No synchronous movement of the respective trailers is necessary and it is immaterial on what series of contacts they respectively rest.

.ln the system of operation herein disclosed the signal impulses are regularly messes alternated over the two line conductors. Each conductor, therefore, carries both dot and dash signal impulses. In this detail the present system differs from that disclosed in my above-mentioned patent in which all the dot signals are sent over one conductor and all the dash signals over the other conductor l claim:

l. The combination with two main telegraph lines of a transmitter for sending dot and dash signal impulses, a transfer switch controlled by the transmitter acting to direct successive impulses alternately into the two lines and receiving means at a distant station for manifesting such impulses in orderly sequence.

2. rThe combination with two main tele- ;Iraph lines of a Morse key for transmitting dot and dash signal impulses, a transfer switch between the key and said lines controlled by the key and acting to successively transfer the transmitting circuit from one line to the other and receiving means at a Adistant station for manifesting such impulses in orderly sequence.

3. T he combination with a telegraph main line comprising a plurality of conductors of a transmitter for sendingt,r dot and dash sig-l nal impulses, an automatic transfer' switch controlled by the transmitter and by which the successive signal impulses are distributed to the several line conductors and receiving means at a distant Station for manivtesting such impulses inrorderly sequence.

1l. The combination with a telegraph main line part of which is composed of a plurality of conductors and part of a single conductor of means for sending in orderly sequence successive signal impulses over the single conductor and distributing said impulses successively in sequence to the several conductors of the other part of the line and receiviner means at a distant station for manifesting such impulses in orderly sequence.

ln testimony whereof, I have hereunto subscribed my name.

PATRICK B. DELANY. ll'i tnesses MARY DU'rroN, CHARLES EDWARD PERKINS. 

